Pulsed laser deposition of thick YBa(sub 2)Cu(sub 3)O(sub 7-(delta)) films on flexible substrates

摘要

As an alternative to bulk processing of high-(Tc) materials for conductor applications, we have been studying the applicability of physical vapor deposition to the problem of developing flexible superconducting elements with high I(sub c). Specifically, we have used a two-step process consisting of ion-assisted sputtering of textured buffer layers on nickel-based substrates, followed by pulsed laser deposition of YBaCu(sub 3)O(sub 7-(delta)) (YBCO) films. The films have been analyzed by measuring the J(sub c) of microbridges, I(sub c) for 1 cm-wide strips, and field dependence up to 9 T. In addition tests have been conducted to determine minimum bending radius of the films.